Indrayani Indrayani, Jumriah, Muhammad Rais, Ernawati S. Kaseng, Muhammad Wiharto, Ardiansyah
Light is one of the important factors affecting the growth and productivity of microalgae biomass. This study aimed to analyze the effect of different light intensities on the growth and biomass productivity of microalga Monoraphidium sp. UNM-IND3. The Monoraphidium sp. UNM-IND3 was cultured in a 300 mL Erlenmeyer flask containing 150 mL of Guillard F/2 media under different light intensities (2000 lux, 4000 lux, 8000 lux), 12 hours light and dark cycles and temperature of 25±1oC (in triplicates). The results showed that the microalga could grow well under different light intensities tested. The highest specific growth rate was achieved at the light intensity of 8000 lux (1.04 day-1) and the lowest obtained at the lowest light intensity of 2000 lux (0.71day-1). The shortest doubling time was obtained in the light-intensity of 8000 lux (0.68 day) and the longest doubling time was obtained in the light-intensity of 2000 lux (0.97 day). There were no significant differences in the biomass yield and biomass productivity under different light intensities tested. The biomass yield ranged from 0.160 to 0.233 g L-1 and biomass productivity ranged from 0.152 to 0.214 g L-1 day-1. This study indicates that microalgae Monoraphidium sp. UNM-IND3 prefers high light intensity for higher growth rate and biomass productivity and it has the potential for outdoor mass cultivation in open pond systems i.e raceway pond. © 2024, BIOFLUX SRL. All rights reserved.
Department of Agricultural Technology, Faculty of Engineering, Universitas Negeri Makassar, South Sulawesi, Makassar, 90224, Indonesia; Department of Biology, Faculty of Mathematics and Natural Sciences, Universitas Negeri Makassar, South Sulawesi, Makassar, 90224, Indonesia; Department of Aquaculture, Pangkep State Polytechnic of Agriculture, South Sulawesi, Pangkep, Indonesia
